Abstract:

Based on the idea represented by authors to reform the ground temperature distribution configuration through controlling and allotting the load, this work focus on the experimental investigation of heat transfer in the UTES and emphasizes to research the effect, temperature potential, ground temperature variety and distribution. Four typical operational modes on the load of heat resources (boreholes of underground heat exchanger), such as equivalent mode, concentrative mode, intermittent mode and heat shield mode were studied experimentally. Thus, a new method of the higher conservation efficiency of UTES has been pursued by means of controlling every load of boreholes to enhance the practical maneuverability in UTES. The reformation of temperature distribution has been ideated and presented, and the behavior of heat shield has been found to realize a higher efficiency and establish an optimization way for UTES.

Key words: pyrology, underground thermal energy storage, operational mode, ground temperature variability, reformation of temperature distribution